forms: reduce empty & readonly textareas to a single row (#26538)

wcs/qommon/form.py

@@ -174,6 +174,8 @@ def text_render_content(self):
         attrs['cols'] = 72
     if not attrs.get('rows'):
         attrs['rows'] = 5
+    if attrs.get('readonly') and not self.value:
+        attrs['rows'] = 1
     return (htmltag("textarea", name=self.name, **attrs) +
         htmlescape(self.value or "") + htmltext("</textarea>"))
 TextWidget.render_content = text_render_content